Adding a PnP Modem to FreeBSD
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You will need to add the modem's PnP ID to the PnP ID list in the serial driver. To enable Plug & Play support, compile a new kernel with controller pnp0 in the configuration file, then reboot the system. The kernel will print the PnP IDs of all the devices it finds. Copy the PnP ID from the modem to the table in /sys/i386/isa/sio.c, at about line 2777. Look for the string "SUP1310" in the structure "siopnp_ids[]" to find the table. Build the kernel again, install, reboot, and your modem should be found.
You may have to manually configure the PnP devices using the `pnp' command in the boot-time configuration with a command like
pnp 1 0 enable os irq0 3 drq0 0 port0 0x2f8
to make the modem show.
1. Build a kernel with options COMCONSOLE.
2. Create /boot.config and place -P as the only text in the file.
3. Unplug the keyboard from the system.
If you don't know how to edit your Kernel Click Here
See /usr/src/sys/i386/boot/biosboot/README.serial for information.
UPDATE / v3.2
I have an internal Plug & Play modem and FreeBSD can't find it.
You will need to add the modem's PnP ID to the PnP ID list in the serial driver. To enable Plug & Play
support, compile a new kernel with controller pnp0 in the configuration file, then reboot the system. The kernel will print the PnP IDs of all the devices it finds. Copy the PnP ID from the modem to the table in /sys/i386/isa/sio.c, at about
line 1200. Look for the string "SUP1310" in the structure "siopnp_ids[]" to find the table. Build the kernel again, install, reboot, and your modem should be found.
You may have to manually configure the PnP
devices using the `pnp' command in the boot-time configuration with a command like
pnp 1 0 enable os irq0 3 drq0 0 port0 0x2f8
to make the modem show.